Improvement in preparing tin salts from tinners waste



nitzli saw fitted tffim tin.

1.80, and add gradually fifteen pounds of niter.

ADCL'PH .OTT, OF NEW YORK, N. Y., ASSIGNOR TO NEW YORK METAL AND CHEMICAL MANUFACTURING COMPANY, OF SAME PLACE.

Letters Patent No. 112,839, dated March 21, 1871;

IMPROVEMENT lN PREPARING TIN SALTS FROM TlNNERS'WASTE.

The Schedule-referred to In these Letters Patent and making part of the name.

I, ADOLPH 0T1, of New York, county and State of New York, have invented a certain Process for Manufacturing Tin Salts from Tiu'ners Waste, of which the following is a specification.

Take the clippings, such as are produced in the manufacture of tin-ware, put them-into a wooden tub and cover them with hydrochloric ormuriatic acid of half the strength of the commercial 'acid, (two hundred and fifteen pounds of hydrochloric acid of the specific weight of 1.20 being required for one ton of clippings,) and heat the liquid by the introduction of steam. When the tin'is all dissolved remove the clippings from the acid bath and wash them with slightly alkaline water. Immerse hereupon fr'esh clippings into the bath until the acid ceases to take uprnol'e Draw now the liquid of protochloride or muriate of tin off, and evaporate it, by eans of steam, in earthenware orleaden vessels until ndicatin g a strength of 60 of Baumes hydrometer.

In order to free this solution from, the iron, which, though present in minute quantities, afiects its properties, I convert it into bichloride of tin, or the fuming liquor of libavius,'by heating one hundred pounds of the above-concentrated liquid with fifty pounds of muriatic acid-of the specific weight of 1.15, thirty pounds of sulphuric acid of the specific weight of This waste, substantially as described.

liquid is distilled in a leaden still, whereby the chloride of iron will remain in the still, while pure bichloride of tin (SnCl,) is distilling over. This bichloride of tin is reconverted into chloride of tin, ordinarily called tin salt, by heating it either in earthenware or leaden vessels by the introduction of-steam, forty-five pounds of finely-granulated Banca tin being requisite for one hundred pounds of the fuming liquid.. From one ton of clippings of two thousand pounds three hundred and fifty-seven pounds of chloride of tin will thus be produced.

Instead of immersing the clippings into a bath of muriatic acid, a mixture of one part in weight of niuric acid, four parts of nrnriatic'acid, and one-fifth part of salammoniac may be taken, one hundred and eighty pounds of muriatic acild of the specific weight of 1.20 being required for this operation, the other chemicals being taken in proportion to this quantity..

Claim.

X claim as my invention- Cihe process of preparing tin salts from timers ADOLPH OTT. Witnesses:

Tao, F. WELLS,

SAM UEL, Bnsexn'rr. 

